@article{campos_lopes_castro_santos_souza_2023,  title={Econometric model of iron ore through principal component analysis and multiple linear regression},  volume={95},  ISSN={0001-3765},  url={https://doi.org/10.1590/0001-3765202320211422},  DOI={10.1590/0001-3765202320211422},  number={1},  journal={Anais da Academia Brasileira de Ciências},  publisher={Academia Brasileira de Ciências},  author={CAMPOS, BÁRBARA ISABELA DA SILVA and LOPES, GISELE C.A. and CASTRO, PHILIPE S.C. DE and SANTOS, TATIANA B. DOS and SOUZA, FELIPE R.},  year={2023},  pages={e20211422} }